#region Copyright (c) 2007 Ryan Williams <drcforbin@gmail.com>
/// <copyright>
/// Copyright (c) 2007 Ryan Williams <drcforbin@gmail.com>
/// 
/// Permission is hereby granted, free of charge, to any person obtaining a copy
/// of this software and associated documentation files (the "Software"), to deal
/// in the Software without restriction, including without limitation the rights
/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
/// copies of the Software, and to permit persons to whom the Software is
/// furnished to do so, subject to the following conditions:
/// 
/// The above copyright notice and this permission notice shall be included in
/// all copies or substantial portions of the Software.
/// 
/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
/// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
/// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
/// THE SOFTWARE.
/// </copyright>
#endregion

using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;

namespace Obfuscar
{
	class NameGroup : IEnumerable<string>
	{
		C5.HashSet<string> names = new C5.HashSet<string>( );

		public string GetNext( )
		{
			int index = 0;
			string name;
			for ( ; ; )
			{
				name = NameMaker.UniqueName( index++ );
				if ( !names.Contains( name ) )
					return name;
			}
		}

		public bool Contains( string name )
		{
			return names.Contains( name );
		}

		public void AddAll( IEnumerable<string> range )
		{
			names.AddAll( range );
		}

		public void Add( string name )
		{
			names.Add( name );
		}

		public static string GetNext( IEnumerable<NameGroup> groups )
		{
			int index = 0;

			string name;
			for ( ; ; )
			{
				name = NameMaker.UniqueName( index++ );

				bool contained = false;
				foreach ( NameGroup group in groups )
				{
					if ( group.Contains( name ) )
					{
						contained = true;
						break;
					}
				}

				if ( !contained )
					return name;
			}
		}

		/// <summary>
		/// See <see cref="IEnumerable.GetEnumerator"/>.
		/// </summary>
		IEnumerator IEnumerable.GetEnumerator( )
		{
			return names.GetEnumerator( );
		}

		public IEnumerator<string> GetEnumerator( )
		{
			return names.GetEnumerator( );
		}
	}
}
